Dust-collector



(No Model.)

R. R. WATTERS.

DUST COLLECTOR.

Patented May 5,1891.

lian: a Jlldtera @litter-wey.

My/ff UNITED STATES PATENT OFFICE.'

RAMA R. VATTERS, OF AKRON, OHIO.

DUST-COLLECTO R.

SPECIFICATION forming part of Letters Patent No. 451,542, dated May 5,1891. Application tiled lune 16, 1888. Serial No. 277,837. (No model.) y

To @ZZ whom it 'ntf/ycoll/(16771,:

it known that I, RAMA R. WA'rTnRs, a citizen of the United States,residing at Akron, in the county of Summit and State of Ohio, haveinvented a certain new and useful Dust-Collector, of which the followingis a specification.

The object of my invention is to provide a simple and effective machineby which solid particles of matter held in suspension in or carried byair, from the most impalpable, as the uncombined particles of carbon insmoke and the dust in grain-reducing mills, to the larger, as kernels ofgrain, sawdust, and planing-mill chips, may be separated therefrom,collected, and retained.

It consists of the construction and arrangement of parts hereinafterfully described, and then specifically pointed out in the claims, duereference being had to the accompanying drawings, forming a part of thisspecification.

In the accompanying drawings, in which similar letters of lreferenceindicatelike parts, Figure 1 is a vertical central section of a machineembodying the essential features of my invention, and Fig. 2 an enlargedview of a portion of Fig. 1 to illustrate the manner in which theparticles of matter are arrested and collected.

Referring to the drawings, A is a hollow cylindrical case mounted tostand vertically on suitable legs B B, and having in the upper and lowerends circular central openings a a', the lower opening preferably largerthan the upper, each having about its edge an inwardly-projectingannular rim, which rims register, respectively, with openings inadjacent inner movable parts, hereinafter described, and provided with adischargespout a2.

In the center of the case A is a vertical shaft O, which projectsthrough the openings a c', and is journaled in suitable bearings c c',attached to the case A, and bears a pulley O', by which it can beturned.

Within the case A are two hollow shells D D similar in shape, theoutline of each being substantially a frustum of a cone, with the largerend down and open, the upper end being closed with a disk or coverthrough which is a central circular opening of the same size as theopening a in the top of the case A. These shells D D are mounted on theshaft C, the former directly above the latter in the following manner:On the shaft O is a tight hub E, having radial arms e, to each of whichis attached a vertical fan-blade F, the upper and lower edges of which,bent at a right angle, are riveted, respectively, to the disk at the topof the shellD, and a solid disk G, having a diameter slightly less thanthe inner diameter of the shellD at the same plane, leaving an annularspace between its edge and the shell. Connected with the lower edge ofthe shell D, and a short distance beneath it, by any suitable device, asstraps t', is an annular disk I, with its diameter slightly exceedingthat of the bottom of the shell, and having its outer edge turned upsaucershaped, so as to be in or slightly below thc horizontal plane ofthe lower edge of the shell D. This annular disk I is preferably in thesame horizontal plane with the top of the shell D', and may be either acontinuation of or a separate piece inclosing and attached to it. Theshell D', having its top preferably in the same plane with the annulardisk I, is supported by radial arms projecting from a tight hub E on theshaft C, and sustains at its lower edge an annular disk I, similar inconstructionv with the disk I and situated in the same relative positiontothe shell D as the disk I bears to the shell D. The opening in thedisk I', preferably-larger than the opening in the disk I, is arrangedto run close to and register with the rim proj ecting inward from theopening a in the lower end of the case A. Thus the shells D D and disksI I', with their connected parts, are firmly secured to the shaft O andrevolve with it.

Attached to the bottom of the disk I are Scrapers 'consisting of bladesJ, with their inner and lower edges close to the rim about the openingct and the bottom of the case A.

In operation the shaft O and connected parts are revolved at a highspeed in either direction by means of the pulley O', which causes thefan-blades c to drive the surrounding air radially toward the inner faceof the shell D. This creates a blast or current inward through theopening a, whereby the dust-laden air is brought into the machine anddriven against the sloping walls of the shell D, upon which all solidparticles of mat- IOO ter are retained by centrifugal force. Thiscentrifugal action of the fan-blades upon the a1 r 1s assisted by thedisk G, over the edges of which the air must pass in its descent, and bywhich it is deflected against the interior ot` the shell D. "hen iii-ststarted, the air for a time escapes between the lower edge of the shellD and the annular disk I; but as the solid particles gather on the shellD they are driven down by centrifugal force, the par ticles lastdeposited sliding and riding over those upon the shell D, and, fallinginto the saucer-shaped rim of the disk I, close the space between it andthe lower edge of the shell D, as shown in Fig. 2, which compels the airto return toward the center and pass through the opening in the top ofthe shell D. In this lower shell D the operation is the saine as in theupper, except that no fan or dellector is used; but the solid particlesremaining in the air are collected 011 its inner face by centrifugalforce and slide down into the saucer-shaped rim of the disk I, while theair escapes through the opening a after the solid particles have closedthe space between the lower edge of the shell D and the disk I. Then thespaces between the shells D D and disks I I are once closed, asufcientamount of solid particles always remains, retained by the peculiar shapeof the disk edges to keep them closed; but as the mass accumulates bythe sliding down of other particles the surplus is forced out by thecombined effects of centrifugal force and the pressure of theaccumulated mass behind and escapes over the edges of the disks I I intothe case A, and, falling by gravitation to its floor, is swept outthrough the discharge-spout a2 by the Scrapers J. I do not, however,confine my invention to the exact construction, arrangement,proportions, or numberof parts herein shown, as the shell D and disk Imay be omitted, being a duplication of the shell D and disk I to insuremore complete action of the machine, in which event the case A isshallower and the scrapers I are attached to the disk I. 'lhe detlectorG and scrapersJv may also be omitted, as the first simply assists indriving the air toward the inner face of the shell l) and the secondsweep the accumulated particles toward the inner face ot the case A andinto the discharge-spout a?, and generally the other perts may beslightly modified, as by changing the angle of the sides ot' the shellsDD',orbyslightlycurving them. The degree of curvature ofthe disks I I',the size of the openings therein, and the manner in which they areattached may be changed; and the fan-blades F may be in either shell andat the top or bottom without departing from my invention.

I claiml. In a dust-collector, the combination, with an inclosingeasehaving inlet and outlet openings and a shaft journaled therein, ot ahollow conical shell open at each end mounted on said shaft, with itssmaller end arranged to receive the air from the inlet-opening, a seriesof fan-blades inclosed in said shell and arranged to revolve therewith,an annular disk connected eoncentrieally therewith, having a raisedouter edge adjacent to and projecting beyond thelarger end of saidshell, and with its central opening arranged to discharge the air intothe outlet-opening, all constructed and arranged substantially asshowmand for the purpose specified.

2. The combination, with the case A, having the openings a a and outleta2, of the shaft C, mounted therein, bearing the shells D D', annulardisks I I', and fan-blades F, all constructed and arranged substantiallyas shown, and for the purpose specified.

3. rlhe combination, with the case A, having openings ad a2, of a shaftC, mounted therein, bearing fan-blades F, shell D, and annular disk I',arranged to discharge the air into outlet a', and Scrapers connectedwith said annular disk I', substantially as shown and described.

In testimony that I claim the above I hereunto set my hand.

RAMA R. WA'llERS.

In presence of- C. IIUMPI-ianr, l II. STUART.

